package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.minio.MinioProperties;
import com.atguigu.lease.web.admin.service.FileService;
import io.minio.*;
import io.minio.errors.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;

@Service
public class FileServiceImpl implements FileService {

    @Autowired
    private MinioClient minioClient;

    @Autowired
    private MinioProperties minioProperties;

    /**
     * 文件上传
     * @param file
     * @return
     */
    @Override
    public String upload(MultipartFile file) throws IOException, ServerException, InsufficientDataException, ErrorResponseException, NoSuchAlgorithmException, InvalidKeyException, InvalidResponseException, XmlParserException, InternalException {

        //查看是否存在
        boolean bucketExists = minioClient.bucketExists(BucketExistsArgs.builder()
                .bucket(minioProperties.getBucketName()).build());

        if (!bucketExists) {
            //创建bucket
            minioClient.makeBucket(MakeBucketArgs.builder()
                    .bucket(minioProperties.getBucketName()).build());

            //设置访问权限
            minioClient.setBucketPolicy(SetBucketPolicyArgs.builder()
                    .bucket(minioProperties.getBucketName())
                    .config(createBucketPolicyConfig(minioProperties.getBucketName()))
                    .build());

        }

        //创建上传文件名
        String fileName = new SimpleDateFormat("yyyyMMdd").format(new Date()) + "/" + UUID.randomUUID()
                + "-" + file.getOriginalFilename();

        //上传文件
        minioClient.putObject(
                PutObjectArgs.builder()
                        .bucket(minioProperties.getBucketName())
                        .stream(file.getInputStream(), file.getSize(), -1)
                        .object(fileName)
                        .contentType(file.getContentType())
                        .build()
        );

        System.out.println("发送成功");
        //返回url
        return String.join("/", minioProperties.getEndpoint(),
                minioProperties.getBucketName(), fileName);
    }

    private String createBucketPolicyConfig(String bucketName) {

        return """
            {
              "Statement" : [ {
                "Action" : "s3:GetObject",
                "Effect" : "Allow",
                "Principal" : "*",
                "Resource" : "arn:aws:s3:::%s/*"
              } ],
              "Version" : "2012-10-17"
            }
            """.formatted(bucketName);
    }
}
